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Acids & Bases. Our Goals. To determine the difference between Acids & Bases Discuss the importance of studying Acids & Bases Perform an experiment dealing with Acids & Bases. What is the pH scale?. The pH scale measures how acidic or basic a solution is. The pH scale.

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Presentation Transcript
our goals
Our Goals
  • To determine the difference between Acids & Bases
  • Discuss the importance of studying Acids & Bases
  • Perform an experiment dealing with Acids & Bases
what is the ph scale
What is the pH scale?
  • The pH scale measures how acidic or basica solution is.
the ph scale
The pH scale
  • The pH scale is the concentration of hydrogen ions in a given substance.
  • ION:an element with a charge due to a loss or gain of an electron
identifying acids and bases
Identifying Acids and Bases
  • Acids have a ph from 0-7
  • Lower pH value indicates a stronger acid.
  • Bases have a pH from 7-14
  • Higher pH value indicates a stronger base.
definitions of acids and bases
Definitions of Acids and Bases
  • An acid is a substance that breaks into ions in an aqueous solution.
  • A Base (alkaline) is a substance that breaks into ions in an aqueous solution.
  • Note: aqueous solution is any solution where is the solvent.
did we miss something
Did we Miss something??
  • What happens when the pH of a substance is 7?
  • Ans: A pH level of 7 indicates a Neutral Substance i.e: Water!
test your knowledge
Test Your Knowledge
  • What is the range of an ACID on the pH scale?

Ans: 0-7

  • What is the range of a BASE and what is another name for a BASE?

Ans: 7-14, Alkaline

characteristics of acids
Characteristics Of Acids

Acids can be characterized by:

  • A sour taste.
  • It turns blue litmus paperred
  • It tastes sour. Try drinking lemon juice (citric acid)
characteristics of bases
Characteristics of Bases

A Base is characterized by:

  • A bitter taste. (Milk of Magnesia)
  • It feels slippery. (Soapy Water)
  • It turns Red LitmusBlue.
phenolphalein demo
Phenolphalein Demo
  • http://studyjams.scholastic.com/studyjams/jams/science/matter/acids-and-bases.htm
why learn about acids bases
Why Learn about Acids & Bases?
  • What do you think is the pH level of FairLawn tap water?
  • The pH of a swimming pool must be checked periodically. Why?
  • Is it important for Lakes & Rivers to maintain a certain pH?
today s experiment
Today’s Experiment
  • Test the pH of Citrus fruit, shampoo, milk of magnesia, tap water, soap and dissolved salt.
  • GOOD LUCK!!!
experiment
Experiment

color of litmus paper acid or base

  • Pepsi:
  • Tap water:
  • Drain Cleaner:
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